Timber Roof Joist Span Tables

View size selection tables.

Timber roof joist span tables.

They also tell you what the maximum spacing should be between each section or timber member size of joists mm clear span c16 joist m clear span c24 joist m 47 x 95 47 x 120 47 x 145 47 x 170 47 x 195 47 x. Listed are 46 tables based on common loading conditions for floor joists ceiling joists and rafters. Rafter spans can be extended slightly beyond what the rafter tables suggest when there is a cantelever extending beyond the supporting wall. Also available for the android os.

Solid timber joist sizes are provided in the bs 8103 3 span tables. View joist rafter tables. Where the tables do not apply or where there are concentrated loads floor joists should be designed by an engineer in accordance with technical requirement r5. Simplified span tables for southern pine lumber and glued laminated timber glulam headers beams and girders.

For pitched roofs flat roofs and ceiling joists. Notches are not to exceed 0 125 of the depth of the joist and are to be located between 0 07 and 0 25 of the span from the support. View allowable load tables. Surveyors span tables for designing roof rafters.

Timber floor joists shall be adequate for the spans and loads and be correctly installed. Span calculator for wood joists and rafters also available for the android os. Span tables span tables can be used to determine the size of a timber member of a particular strength class required for a given span. Ceiling joist span use this table to determine the maximum lengths of ceiling joists based on species of lumber joist spacing and joist size.

Timber to be covered these span tables do not apply to timber which is fully exposed to the elements.